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Anil purchased a product from a supermarket and he found that its wrapper contains light and dark bars. What is the purpose of this ? |
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Answer» This light and dark bars are called bar code. It is used to record some details about the product such as item code, name, price etc. A device called Bar Code Reader contains photo electric scanner that read the bar code and input the information to the computer attached to it. It helps to reduce error and process the bills quickly |
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